Jewels of Darknessby Level 9(Black Firebird plastic case)

The more recognized U.S. release, the black plastic case. Naming
Firebird as the actual developer is a common misconception among
collectors. Firebird developed numerous low-end titles of their own,
including several adventures, but are better known for distributing
releases by other companies. Rainbird is actually Firebird's label
for their best titles (usually developed by other companies, such
as Level 9 and Magnetic Scrolls).